Tubular lantern.



G. IBERGENERl TUBULAB LANTEBN. APPLIoATIoN'rILLgD MAB. ao, 1909.

962,114, Pagtented June 21, 1910.

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CHARLES BEEGNER, OF ROCHESTER, NEW YORK, ASS-IGNOB. TO T. HAM.

MANUFACTURING COMPANY, 0F ROCHESTER, lil/V YORL .TUBULAR LANTERN. Y

To all whom it may concern:

Be it known that I, CHARLES BERGENER, a citizen of the United -States, residing at Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvementin Tubular Lanterns,

of which the following is a specification.

This invention relates to the construction of tubular lantern frames and particularly to that class of frames in which the tubes areeach composed of two stamped halftubes, each of which is of half-round cross section and which are secured together by seams extending along the inner and outer edges of the half-tubes.

The invention has for its object to stilifen the tubular frame and to avoid imperfections in the shape of the tubes.

In the accompanying drawings: Figure 1 is an elevation of a tubular lantern frame embodying this invention. Fig. 2 is an elevation showing the two constituent halftubes of a tube preparatoryto securing the half tubes together. Fig. 3 is a cross section in line 33, Fig. 1, on an enlarged scale. Fig. 4 is a vertical section in line 4 4, Fig. 1, on an enlarged scale.

`Like reference characters refer to like parts in the several figures.

A represents the base of the lantern frame comprising the oil pot 10, the air chamber 11 thereon, and theburner-12.

B represents the air -tubes formed each with a lower elbow portion 13 which connects with the air chamber and. with an upper elbow portion 14.

15 represents the upright central tube formed with an upper horizontal tube section 16 which is interposedbetween the upper elbow portions 14 of the two tubes and which forms with the central tube a T piece.

Each air tube is composed of two halftubes 17, 18, of half-round cross section and provided along their inner and outer edges respectivel with 'flanges 19,' 20, which are united in t e form of a seam when the halves have been placed against each other, one of the flanges 19 being so wide that it can be closed around the opposing Bange of the Speccation of Letters Patent. Patented June 21, 19M).

Application filed March 30, 1909./ Serial No. 486,807.

other half-tube. The T piece comprising the central tube 15 and the horizontal tube 1G is similarly composed of two stamped halves 21, 22, united by sea-med iianges 23, 24.

25 represents a hollow rib which is formed lengthwise in each half-tube and centrally on the half-round surface thereof or inidway between the edges thereof and extending preferably from end to end of the tube, inclusive of the elbow portions. These ribs serve not only to strengthen and stiffen the tube but also to draw or stretch the .sheet metal as it is being shaped between the dies in stamping the half-tube out of a flat blank,

' and thereby avoid the buckling of the sheet metal in being stamped, which occurs more or less in forming this class of tubes and causes Hat or otherwise misshapen Spots in the surface of the tube and impairs, the strength as well as the appearanceof the same.

The upper ends of the tubes may be con- Fig. 1, comprising a horizontal and a ver-. tical tube and composed of `two halves stamped of sheet metal and secured together by seams on opposite sides. Each half has its horizontal ortion formed with a hollow longitudinal r1b 26 formed in line' with the horizontal upper end portion of the rib 25 so as to form a continuation of the latter.

'I claim as my invention:

1. A tubular lantern having tubes which are each composed of two `substantially half round half-tubes, stamped-.ot-.sheet metal .and secured togetherv by -seai'ns on the inner 'nected, as usual, with a l"piece, as shown in Y per end of the corresponding rib on the side tube, substantially as set forth. 10 Witness my hand in the presence of two subscribing witnesses.

piece interposed between the upper ends of the tubes, said piece comprising a horizontal and a. vertical tube and being composed of two halves stamped of sheet -rnetal and se- 5 cured together by seams on opposite sides, CHARLES BERGENER."

each half having its horizontal portion Witnesses:

formed with a hollow longitudinal rib GEO. W. HAM, thrown out on-each side in line with the upl LYMAN S. PHIPPS. 

